<template>
  <div class="app-container">
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" :min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
            这里不能使用ajax进行异步调用，要用组件内部封装的方法
      v-show：是否显示上传组件（即窗口弹出）
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件  
      @crop-upload-success：上传成功后的回调 
      field: 类似于<input type="file" name="file"/>里的name,需要与后端接口保持一致。
      -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'eduoss/fileoss'"
                        field="file"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
  components : {ImageCropper, PanThumb},
  data () {
    return {
      teacher : {
        // name: '',
        // sort: 0,
        // level: 1,
        // career: '',
        // intro: '',
        // avatar: 'https://wpimg.wallstcn.com/f778738c-e4f8-4870-b634-56703b4acafe.gif'
      },
      imagecropperShow : false,//是否显示上传组件（即窗口弹出）
      imagecropperKey : 0,
      BASE_API : process.env.BASE_API,
      saveBtnDisabled : false
    }
  },
  created() {
    this.init()
  },
  watch: {  //监听
    $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
      this.init()
    }
  },
  methods: {
    //上传头像窗口关闭方法
    close() {
      console.log(this.BASE_API)
      console.log('调用close方法')
      this.imagecropperShow = false
      //类似于初始化图片
      this.imagecropperKey = this.imagecropperKey + 1
    },
    //上传头像成功方法
    cropSuccess(data) {
      console.log('调用cropSuccess方法')
      console.log(data.url)
      this.imagecropperShow = false
      //data类似于response.data
      this.teacher.avatar = data.url
      //类似于初始化图片
      this.imagecropperKey = this.imagecropperKey + 1
    },
    //根据路径是否有id进行相应初始化
    init() {
      if (this.$route.params && this.$route.params.id) {//如果有id，说明是修改方法
        //从路径获取id值
        const id = this.$route.params.id
        this.getInfo(id)
      } else {//如果没有id，说明是新增方法
        this.teacher = {}
        this.teacher.sort = 0 //默认排序
        // this.teacher.avatar = 'https://wpimg.wallstcn.com/f778738c-e4f8-4870-b634-56703b4acafe.gif' //默认头像
        this.teacher.avatar = 'https://read-picture-001.oss-cn-beijing.aliyuncs.com/teacher_icon.jpg' //默认头像
      }
    },
    //保存或修改
    saveOrUpdate() {
      //判断this.teacher是否包含id
      if (this.teacher.id) {
        this.updateTeacher()
      } else {
        this.addTeacher()
      }
    },
    //根据讲师id（路径包含）查询讲师
    getInfo(id) {
      teacherApi.getTeacherInfo(id)
                .then(response => {
                  this.teacher = response.data.teacher
                })
    },
    //添加讲师
    addTeacher() {
      teacherApi.addTeacher(this.teacher)
                .then(response => {
                  this.$message({
                    type: 'success',
                    message: '添加成功!'
                  });
                  this.$router.push({path : '/teacher/table'})
                })
    },
    //更新讲师
    updateTeacher() {
      teacherApi.updateTeacherInfo(this.teacher)
              .then(response => {
                this.$message({
                    type: 'success',
                    message: '更新成功!'
                  });
                  this.$router.push({path : '/teacher/table'})
              })
    }
  },
}
</script>
